Track ID 1: video (V_MPEG4/ISO/AVC)Track ID 2: audio (A_DTS)Track ID 3: subtitles (S_TEXT/UTF8)Track ID 4: subtitles (S_TEXT/UTF8)Chapters: 74 entries2. Verify which subtitle track you want to convert (I do this using VLC on another computer, maybe there is a way to do it on command line). Let's say we want the subtitles on Track ID 3